This accomplishes his goal of making this project as small as possible ... While this might not be the simplest Nixie clock ever, it is certainly close, more easily readable, and the most detailed ...

💕【EASY TO HANG】The small clocks battery operated come with a hook, wide slot in back for easy hanging.The ideal wall clock for living room,you will be sure to catch the attention of your ...

While the Arduino does have a clock function that can be used, an RTC might serve him better – then again if he’s gone for just a day or two at a time, a small amount of drift may not be an issue.